Frequent question: Where are Yogo sapphires found in Montana?

Yogo sapphires are a variety of corundum found only in the Yogo Gulch area, in Judith Basin county, Montana.

Where do you find Yogo Sapphires?

History and Information about Yogo Sapphires

Yogo sapphires are a variety of corundum found only in Yogo Gulch, part of the Little Belt Mountains in Judith Basin County, Montana, United States, on land once inhabited by the Piegan Blackfeet people.

Where is Yogo Creek in Montana?

Yogo sapphires are mined in Montana at Yogo Gulch (46°50′45″N 110°18′38″W), which is in Judith Basin County, Montana, 12 miles (19 km) southwest of Utica, 45 miles (72 km) west-southwest of Lewistown, and east of Great Falls.

Are Yogo Sapphires worth valuable?

Because of their fine quality, the price differential between Yogo and other fancy Montana sapphires can be significant. Baide said that other Montana sapphires can average about $1,000 per carat, compared with somewhere around $10,000 per carat for a Yogo sapphire.

Where do Montana sapphires come from?

Fancy Montana Sapphires are found in three major areas in the western half of the state: Missouri River near Helena, Rock Creek in the Sapphire Mountains, and Dry Cottonwood near Deer Lodge. These sapphires vary greatly from the Yogo Sapphire in that most of the sapphires require heat treating.

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Are Montana sapphires valuable?

Montana Sapphire

To be specific, the majority is under 1/2ct and a very limited supply of the sapphires are over 1ct, which makes the stone substantially more expensive per carat. Typical Montana sapphire can cost anywhere from $250-$1500 per carat for under 1/2ct to upwards of $7000 per carat for larger than 5 carats.

Are Montana sapphire Rare?

Are Montana Sapphires Rare? Montana sapphire is not found in very large rough pieces. Considering that a rough nugget will yield a cut stone only about 1/3 of the original size means that large, fine quality faceted Montana sapphires are very rare.

What is special about Montana sapphire?

One of the most striking differences is their color. Sapphires from Montana are unique in that they naturally occur in light pastels, unique blue-greens, and smoky grays. So, a Montana sapphire could be a calming leaf green or a sky blue-grey.

Is there gold in the Little Belt Mountains Montana?


The Montana (Neihart) district in the southeast corner of Cascade County, in the central Little Belt Mountains just east of Neihart, has produced chiefly silver and lead, some copper and zinc, and gold as a byproduct. … Total recorded gold production through 1959 was about 67,000 ounces.

What is a Montana blue sapphire?

A Montana sapphire is, simply, a sapphire from Montana. Yogo sapphires are also Montana sapphires, but originate from a particular deposit known for its excellent cornflower blue color. Both sapphires and rubies are gem-quality corundum. … With a hardness of 9 on the Mohs scale, only diamond can scratch a sapphire.

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What is the difference between a Yogo Sapphire and a Montana sapphire?

While the color of Yogo Sapphires is always a vivid blue, Montana sapphires are found with different colors including green and yellow. While there are productive sapphire mines in other parts of Montana, they rarely produce blue sapphires that have the striking color and clarity of those found in the Yogo Gulch.

What jewelry is Montana known for?

Perhaps one of the most popular and well known American Gemstones is Montana Sapphire. This is for good reason, too – Montana, known as the “Treasure State,” produces nearly all of the sapphire mined in North America.

How do you clean Yogo Sapphires?

The safest way to clean the majority of your jewelry is with a soft tooth brush, warm water, and mild dish soap free of any abrasives. While your sapphire has a hardness of 9, second only to diamond; the precious metals that hold your sapphire are quite soft.

What is the largest sapphire ever found in Montana?

Rock Creek, Montana—Potentate Mining has unveiled a 64.14-carat sapphire recovered at its Rock Creek mine in Montana. The mining company believes it to be the largest gem-quality sapphire to be unearthed in the U.S.

Are Montana sapphires good quality?

Unique colors, high clarity, USA-born status, and great durability make Montana Sapphires shine. Montana Sapphires are part of the larger gem family “corundum.” Corundum is a hard stone, at a 9 out of 10 on the Mohs scale, making it very durable to wear in jewelry.

Are Montana sapphires from Montana?

Sapphires have been known to occur in Montana for over 150 years and have been actively mined there for more than 100 years. … Most of the sapphires from Montana are a pale green to blue-green when they are mined, with very limited numbers of deep blues and other fancy colors such as yellow, orange, violet and pink.

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